As a beginner in generating charts using the ajax mechanism and chartjs, I've encountered an issue where the graphs are being plotted incorrectly. Any guidance on how to improve would be greatly appreciated. Thank you!
Here is my JavaScript code for plotting the chart:
var ctx = document.getElementById('myChart').getContext('2d');
$.ajax({
url:"/dashboard",
type:"POST",
data: {},
error: function() {
alert("Error");
},
success: function(data, status, xhr) {
debugger
// declare all variables to draw chart
var chartDim = {};
var chartDim = data.chartDim;
var xLabels = data.labels;
var vLabels = [];
var vData = [];
let newValues =[]
// get from database to push to draw the chart
for (const [key, values] of Object.entries(chartDim)) {
vLabels.push(key);
let newValues = values.map(myFunction);
debugger;
vData.push(newValues);
}
debugger
var myChart = new Chart(ctx, {
data: {
labels: xLabels,
datasets: []
},
options: {
responsive: false
}
});
// draw to chart
debugger
for (i= 0; i < vLabels.length; i++ ) {
myChart.data.datasets.push({
label: vLabels[i],
type: "bar",
borderColor: '#'+(0x1100000+Math.random()*0xffffff).toString(16).substr(1,6),
backgroundColor: "rgba(249, 238, 236, 0.74)",
data: vData[i],
spanGaps: true
});
myChart.update();
}
}})